Pretty sure this is a combination of heat/light burn exasperated by low rh. I keep 1" of water in the flood trays now and the rh with the lights on runs about 40% to 50%. Temps are around 75+/-; footcandles 4000 +/-. I also snapped off the tops trying to super crop. Wondering if they are too damaged to warrant continuing or if there is any first aid for the poor little girls.
The lower right photo is purple diesel doing just fine. More or less the same conditions and feeding (earth juice). The are in the back under a 1kmh, 2 sweettooth in the middle, then 4 ssh. I Figure 6 girls will easily fill the 4x4 screen; another 2x4 screen goes over the purp d today. I've got 3 chenobyl I could substitute for the ssh if necessary.
The ssh are now under a stationary 600w hps. A 600w mh digilux is due today.
I'm also thinking maybe the ssh need less feeding than the pd.